The OpenVox B400E is a half length ISDN BRI (Basic Rate Interface) PCI-Express card, which includes an on-board Siemens® technology based echo cancellation module. The B400E provides four ISDN
BRI S/T ports, which makes it an ideal cost effective option for small
to medium sized enterprise applications. OpenVox are a Fonality®
Authorized / Certified Ecosystem (FACE) partner and the OpenVox B400E
is officially certified for use with Trixbox®.

The B400E supports both TE (Terminal Equipment) and powered NT (Network
Terminating) modes. The B400E provides functionality similar to ISDN
BRI cards from alternative vendors such as the Digium® B410P,
Junghanns® duoBRI and beroNet® BNXS0.

Standard PC (Personal Computer) hardware can be used along with B400E
cards to provide a low cost migration path from legacy ISDN PBXs
towards an Open Source IP PBX based solution. The B400E is compatible
with leading open source IP PBX software such as Asterisk®, Trixbox®,
and Elastix® (OpenVox are an Elastix® Strategic partner), which support
all the sophisticated features of expensive high-end PBX/Voicemail
platforms.
Although developed primarily for Open Source IP PBX Asterisk® based
applications, the B400E can be used for any Linux applications/systems
that require ISDN connectivity, e.g. Linux ISDN firewalls, VoIP
gateways and routers.

Siemens® Echo Cancellation Module Features

128ms tail/channel (on all channel densities)

Supports G.165 and G.168 standards

Supports 8-channel echo cancellation

No CPU load as a result of echo cancellation

Does not increase the physical size of the card, and no additional slot is required